Combination blasting tool



March 29, 1960 F. w. JENNERMAN COMBINATION BLASTING TOOL Filed Aug. 15,1957 uvwzzvron. was

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States Patent ice ' by bolts 19 between the free or forward end portionsof V The present invention relates to .new and useful 'improvements inblasting tools for use particularlyby dynamiters and has for its primaryobject to provide ii 1 fa single implement novel means for expeditiouslysplitting and cutting fuses, crimping caps, opening wrappers andpunching holes or depressions in sticks of dynamite.

Another important object of the invention is to provide, in a manner ashereinafter set forth, a combination blastingtoolof the. aforementionedcharacter wherein asingle blade accomplishes the fuse splitting andcutting operations. I L

Still another important object of the invention is to provide .acombination blasting tool of the character described comprisingcommonmeans for crimpingcaps and adjustably controlling the operatingdepth of the aforementioned blade when splitting fuses.

Other objects of the invention are to provide a combination tool of thecharacter set forth which will be comparatively simple in construction,strong, durable, compact, of lightweight, highly efficient and reliablein use and which may be manufactured at low cost.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in wh ch:

Figure 1 is a view in side elevation of a tool constructed in accordancewith the present invention;

Figure 2 is a plan view of the device;

Figure 3 is a view in vertical longitudinal section through the tool;

Figure 4 is a view in transverse section through the forward end portionof the device, taken substantially on the line 4-4 of Figure 3; and

Figure 5 is a view in transverse section through an intermediate portionof the tool, taken substantially on the line 5--5 of Figure 3.

' Referring now to the drawing in detail, it will be seen that theembodiment of the invention which has been illustrated comprises a pairof elongated metallichandles 6 and 7 of substantially 'U-shaped crosssection. The

handles 6 and 7 are crossed and pivotally connected at one end, asindicatedat 8. I

Formed integrally with the pivoted end of the handle 6 is a pair offorwardly projecting, spaced arms 9 which terminate in outwardly offset,apertured free end portions 10 having a fuse holder 11 securedtherebetween by screws 12. The holder 11 includes a block or body 13 ofsuitable material having mounted longitudinally therein a longitudinallysplit tube 14 for the reception of an end portion of a fuse. The blockor body 13 is further provided with a longitudinal slot 15 whichcommunicates throughout its length with the split tube 14. Formedintegrally with the block or body 13' on opposite sides of the slot 15is a pair of flanges 16. The forward end portions of the flanges 16 areprovided, adjacentthe block or body 13, with notches or recesses 17 forthe reception of a fuse to be cut off.

'the arms 18-is 'a blade 20 which extends slidably into the holderllbetween the flanges 16 for engagement with a fuse in the tube 14 or inthe notches 17. The handles 6 and 7 are opened by a spring 21 mountedbetween the pivotally connected end portions of said handles for re-=.tracting the blade 20. A bolt 22 extending between the flanges 16 isengaged in an arcuate slot 23 provided therefor in the blade 20 forlimiting the travel of said blade under the influence of the spring 21.

Also mounted on the free end portions of the arms 18 and projecting inthe opposite direction from the blade 20 is a-substantially U-shapcdguide 24 for'the reception .of a stick of dynamite to be unwrapped. Theguide 24 comprises duplicate arcuate'half sections 25 provided withmounting flanges 26 secured by the bolts 19 between the blade 20 and thearms 18. The outer end portion of the blade 20 is notched or recessed as'at 27 (see Figure 3.) for the reception of a knife 28 which projectsinto the 'guide 24 for cutting the wrapper on a stick of dynamite.

A bolt 29 in the guide flanges 26 secures the knife 28 in the notch orrecess 27.

A fuse criiriper 30 is provided at an intermediate point on the handles6 and 7. The crimper-3tl includes an anvil 31 secured at 32 in thehandle 7 between plates 33. The anvil 31 comprises an inwardlyprojecting portion 34 (see Figure 3) having a substantially U-shapednotch or recess 35 therein for the reception of a cap to be crimped. Thespaced plates 33 also project inwardly beyond the handle 7 and haveformed therein substantially U-shaped notches or recesses 34 which arealigned with the notch or recess 35 for the reception of the cap.

The crimper 30 further comprises a substantially U- shaped saddle 36which is fixed longitudinally on the back of the handle 6. Extendingslidably through the saddle 36 and the bight portion of the handle 6 isa threaded shank or shaft 37. Fixed on the inner end of the threadedshank or shaft 37 is a substantially U- shaped jaw 38 which is adaptedto straddle the projection 34 for engagementwith the anvil 31 and which,further, is engageable with a cap ;in the notches or recesses 35 and 34for crimping said cap in conjunction with said anvil. Engagement of thejaw 38 with the anvil 31 also limits the movement of the handles 6 and 7toward each other, thus regulating the travel of the blade 29 toward 7saddle 36.

' Secured longitudinally at 42 in the free end portion ,Of the handle 7and projecting rearwardly therefrom is a punch 41 for forming holes ordepressions in a stick of dynamite.

It is thought that the use of the tool will be readily apparent from aconsideration of the foregoing. Briefly,

vious manner. To cut a fuse off to the desired length, said fuse isinserted in, the notches or recesses 17 in the flanges 16 and thehandles 6 and 7 are again closed,

To crimp a cap, said cap is inserted in the anvil 31 and. the handles 6and 7 are closed for engaging the jaw 38 with said cap. As hereinbeforestated, by adjusting the jaw 38 on the handle 6 through the medium ofthe elements 39, 37, 40, etc.', the depth of the blade 20 when splittinga fuse in the holder 11 may be controlled. To remove a wrapper from astick of dynamite, the stick is engaged in the substantially U-shapedguide 25 and moved longitudinally therein for causing the knife 28 tosplit said wrapper. The punch 41 may now be brought into use for forminga hole or depression in the dynamite stick for the reception of the cap.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limittheinvention to the exact construction and operation shown and described,and accordingly all suitable modifications and equivalents may beresorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A blasting tool comprising a pliers-like body having jaws forwardlyof the pivot and handles rearwardly of the pivot, means on one of saidjaws for longitudinally accommodating a fuse, a blade on the other jawengaging and penetrating said fuse accommodating means for splitting afuse upon movement of the jaws toward each other, adjustable stop meanson the handles for gauging the movement of the jaws toward each otherand determining the depth of the split formed in the fuse, bifurcatedfuse holding means on said one jaw closer to the blade than said fuseaccommodating means and extending transversely thereto, said wfuseholding means in alignment with said blade for cutting off a length offuse upon closing movement of the jaws, means on said said blade andengaged with said fuse holding means for limiting the open movement ofsaid jaws, said stop means including cap crimping means having an anvilon one handle and an adjustable crimping jaw on the other handle inalignment therewith so that crimping of the cap takes place when thehandles are moved toward each other, said crimping jaw being adjustablypositioned a distance from said other handle such that the anvil abutsthereagainst when the blade has penetrated the fuse ac commodating meansto the desired depth.

2. The combination of claim 1 wherein said fuse accommodating meansincludes a longitudinally split tube.

3. The combination of claim 1 wherein said open movement limiting meansincludes an arcuate slot in said blade and a pin secured to said fuseholding means extending into said slot.

References Cited in the file of this patent UNITED STATES PATENTS527,132 Teel Oct. 9, 1894 610,305 Mino et al Sept. 6, 1898 1,431,421Prince Oct. 10, 1922 1,529,857 Yourek et a1 Mar. 17, 1925 1,552,495 MohrSept. 8, 1925 2,127,378 Vorhies Aug. 16, 1938

